Cooling system for internal-combustion engines



Feb". 7, 1928. 1,658,773

A. 'rAua f COOLING SYSTEI FOR INTERNAL GOMBUSTION ENGINES i Y Filed Nov. 24. 1925 2 Sheets-Sheqt 1 l ZL. |..-5 v'f l..

Feb. 7, 192s.l 1,658,773

A. TAUB COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed NOV. 24. 1925 2 Sheets-Sheet 2 wuwtoz blme?,

Patented Feb; -7, 1928.

i UNITED STATES PATENT oFElcE.

.ALEX TAUB, 0F DETROIT, MICHIGAN, ASSIGNOR T0 GENERAL MOTORS CORPORATION,

OF DETROIT, MICHIGAN, A CORPORATION 0F DELAWARE.

COOLING SYSTEM FOR INTERNAL-COMBUSTION ENGINES.

Application tiled November 24, 1923. Serial No. 676,775.

ing suitable conduits for the supply of combustible mixture to and the flow of burned 'gases from the several cylinders, together with a jacket space through which cooling liquid may How to cool the parts, are formed and provided in a single unitary cylinder blck; and particularly to a pump and its disposition relative to the block and to the cylinders and supply and exhaust conduits and passages thereof,l for causing cooling liquid to flow through the jacket space aforesaid.

rlhe object of. my invention is to provide a cylinder block construction of the type, and a rotary pump for the purpose above stated, and wherein the casing for the liquid forcing member or impeller of the pump is made integral with the cylinder block; the inte* rior of the casing being separated from the jacket space by a web and the pump being arranged to discharge directly into the jacket space. The pump employed is preferably of the centrifugal type having an impeller provided with vanes and operating Within a spiral or helically shaped pulnp casing; and the arrangement of the pump casing, and particularly of the outlet opening therefrom, is preferably such that the stream of cooling .liquid is directed toward and along the supply and exhaust conduits for the several cylinders; to thereby more effectively cool the valves of the engine by causing the cooling liquid to flow adjacent them when it is in its coolest condition which, obviously, is immediately upon its return from the radiator and before it has become heated by the parts to be cooled.

l/Vith the aboveA and other objects of invention in view my invention consists in the improved cooling means for internal comustion` engines illustrated in the accompanyi'ng drawings and hereinafter described and explained; and in Such variations and modifications thereof, within the scope of the concluding claims skilled in the art lates.- In the drawings accompanying and forms? ing a part of this specification and wherein the preferred form ofl my invention isillustrated: t

Figure 1 is a Vfragmentary view partly in side elevation and partly in section upon a vertically longitudinally extending plane, showing a multiple cylinder engine equipped as will be obvious to those to wh1ch my invention re- 50 with my invention. Y .f

Figure 2 is a view showing the parts to the right of a vertical transverse plane indicated by the line 2, 27 Figure 1, in elevation.

Figure 3 is a fragmentary view upon a vertical transverse plane indicated by the 05 line 3, 3, Figure 1.

Figure 4 is a view showing .a section uponv j a horizontal plane indicated by the line 4,

4,.Figure 3, looking down; the rotary impileller of the pump,.howeven-being-shown in p an.

Referring now to the drawings, the reference nu'meral 5 designates'an internal combustion engine block having a number of parallel cylinders 6, supply and exhaust cony,duits 7' and 8 for each cylinder, and an internal jacket space 9 through which a cool ing liquid flows in intimate Contact with the cylinders and conduits to thereby cool the engine. The conduits 7, 8 which lead into 80 and out from the combustion chambers at the upper ends of the cylinders 6 are c0n trolled by puppet valves, the stems 10 of which appear in Figure 4. The head for the block 5 is designated by the numeral 11, and 85 the cylinders, and supply and exhaust conduits, the crank case of the engine, and the connecting walls between said parts are illustrated as comprising an integral cylinder block structure formed as a single casing, as is usual in internal combustion engine practice.

The 'reference numeral 12 designates a pump casing which is formed integrally with the cylinder block 5.and is located. at one end thereof, andthe interior of which is in lwith said conduits when its temperature'is the lowest, and before it has been heated by heat derived from the cylinders of the engine. As a matter of cours the jacket space is full of cooling liquid when the engine is in operation but the arrangement of the'dis charge opening 13 as specified directs the iiow of the issuing stream toward the suppl and exhaust passages, and tends to maintain the cooling liquid adjacent said passages and the valves of the engine at a lower temperature than the average temperature within the jacket space, thus more effectively cooling the valves, as will be understood.

The Bump employed in my invention is prefera ly of the centrifugal type as exempliied by the spiral or helical form of the casing thereof, in cross-section, clearly shown in Figure3; and the interior of the pump casing is separated from the jacket space 9 by a similarly shaped web or partition 14 preferably made integral with the pump casing and cylinder block, and terminating at the discharge opening 13 from the casing. This web extends inward from the pump casino and its inner periphery provides a circu ar central opening adjacent which the closed inner side or end wall 15 of the impeller lies, and by which 'features the interior of the pump casing is in effect sepa-- rated yfrom the jacket space 9 except at the discharge o enin 13.

The impe ler o the pump is provided with vanes 16, as is usual in centrifugal pumps, and the same is secuied to a driving shaft 17 the inner end of which is supported from the pump casing in a suitable bearing; lwhich bearing 1s shown at 18 as in a head 19 which closes an opening in the outer end of the pump casing, and is secured to said casing by bolts 20. The inlet 21 to the pump casing is shown as leading through the head 19; and said head is shown as having an arm 22 which supports an-outer bearing 23 for the shaft 17. The shaft 17 also serves to drive the fan 24 in the embodiment of my invention illustrated, and as is usual in internal combustion engines; the shaft being driven throughy a fan pulley 25 and belt '.26 from the crank shaft 27 of the engine. `A hole 28 is preferably provided at the lowest part ofthe pump casing through the web 14 so that in draining the jacket space such cooling liquid as would otherwise be trapped in the'pump casing by said web may flow into the jacket space, and therefrom through the usual drainage outlet from'U the jacket space whieh, as will be appreciated, leads from the lowermost part of the jacket.

Having thus described and explained my invention, I claim and desire to secure by Letters Patent of the United States:

1. In an internal combustion engine, a plurality of cylinders arranged parallel with one another, and supply and exhaust pas sages arranged to one side of and leading discharge port arranged to one side of the plane of the axes of the cylinders and lead- 'ing directly into said jacket space substantially in line with the passages aforesaid, so that the stream of cooling liquid established by the pump will be directedtoward and along the valves of the engine; ahead adapted to fit within the opening aforesaid and to be secured to said pump casing; a bearing in said head; a rotatable shaft supported in said bearing; lan impeller carried by said shaft and located within said pump casing; and a supply conduit carried by said head and leading therethrough and into said pump casing.

2. In an internal combustion en ine, a plurality of cylinders arranged paral el with one another, and supply and exhaust assages arranged to one side of and lea ing to and from said cylinders, all formed in a single block or casting having also a jacket space throurrh which a coolin liquid may flow to cool the parts; a helica ump casing formed integrally with said b ock at one end thereof; a rotatable impeller located within said chamber, and means for driving the same; and a helical web whereby the interior of said pump casing is separated from said jacket space and which web has an opening conforming, substantially, with the periphery vo f said impeller at the inner closed' end thereof, and a secondl opening arranged to one side of the plane of the axes of said cylinders and substantially in line with the passages aforesaid.

3. In an 'internal combustion en ne, a unitary cylinder block having a pliirality of cylinders, supply 'and exhaust passages arranged to one side of and through which combustible mixture flows to and exhaust gases flow from said cylinders, and a jacket space through which'a cooling liquid flows to cool said parts; a pump casing formed integrallyA with said block 'andlocated at o'ne end thereof, and the interior of which casing is in direct communication with the lill lill) a series of venes, and a closed circular Wall 10 disposed adjacent the opening aforesaid in said web; and a a bearing carried by. said pump casing and to which said impeller is fastened.

In testimony whereof I aix my signa- 15 Atnl'e.-

ALEX TAUB.

driving shaft rotatablel in 

